DIPTEKA. 423 



pair. Abdomen brown, with a hoary band on the hind border of each 

 segment ; under side tawny. Legs testaceous ; tips of the femora, of the 

 tibiae and of the joints of the tarsi brown. Wings limpid ; veins brown, 

 strongly defined; discal mark distinct. Halteres testaceous. Length of 

 the body 3 lines ; of the wings 5 lines. 

 United States. 



Chieonoxius vicarius, Mas et Foem. 



Testaceus ; antenna; fusccB ; thorax fusco quadrhittatus ; pedes puhes- 

 ceutes, tibiis et iarsorum articulis apice fuscis ; alee limpidcc, venis 

 testaeeis, litura discali nigra. Mas. — Abdomen supra fuscum, ma- 

 culis lateralihus lanceolatis albidis ; abdomen vitta dorsali fusca. 



Testaceous. Antennae brown. Thorax with four brown bands, the 

 outer pair broad and short. Legs pubescent, long, slender ; fore meta- 

 tarsus a little longer than the fore tibia ; tips of the tibiee and of the 

 joints of the tarsi brown. Wings limpid; veins testaceous; discal mark 

 black. Male. — Stripes of the thorax paler than those of the female. 

 Abdomen above brown, with two laiiceolate whitish spots on each seg- 

 ment. Legs more pubescent than those of the female, especially the fore 

 tarsi, which are rather stout. Female. — Abdomen with a brown dorsal 

 stripe. Length of the body 5 lines ; of the wings 8 lines. 



East Indies. 



ChIRONOMUS AI.TERNANS, MaS. 



Testaceus; antennce fuscce ; thorax vittis duabus dorsalibns lateribusque 

 viridibus ; abdomen viridc, pubescens, vitta intcrrupla fusca dorsali ; 

 pedes virides, pubescentes, tibiis et tarsorum articulis apice fusces- 

 centibus ; alee limpida, venis testaeeis, litura discali subobscuriore. 



Testaceous. Antenns brown. Thorax green on each side, and with 

 two green dorsal stripes. Abdomen green, pubescent, with an inter- 

 rupted brown dorsal stripe. Legs green, long, slender, pubescent; tips 

 of the tibia) and of the joints of the tarsi brownish ; fore tibia very much 

 longer than the fore metatarsus. Wings limpid ; veins testaceous ; discal 



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